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<p>I've replaced breakers with those symptoms and solved the problem. </p>
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<p id="reply-intro">On 2021-05-09 08:52, Kirk Herander, VSE wrote:</p>
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<div id="v1__MailbirdStyleContent" dir="ltr" style="font-size: 12pt; font-family: Arial; color: #000000; text-align: left;">That's what I expected to find, i.e. evidence of a heat event / loose connection at the breaker terminals (discolored and / or melted wire insulation, etc.), no visual evidence or smell.<br />
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<p class="v1MsoNormal" style="font-family: Arial; font-size: 16px; margin: 0in 0in 0.0001pt;"><span style="font-size: 10pt;"><a name="_MailAutoSig"></a><strong>Kirk Herander / </strong><strong><a style="cursor: pointer; color: blue;" title="Send an email to kirkh@vermont.solar" href="mailto:kirkh@vermont.solar" rel="noreferrer">kirkh@vermont.solar</a></strong></span></p>
<p class="v1MsoNormal" style="font-family: Arial; font-size: 16px; margin: 0in 0in 0.0001pt;"><span style="font-size: 10pt;"><strong>Owner|Principal, VT Solar, LLC</strong></span></p>
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<p class="v1MsoNormal" style="font-family: Arial; font-size: 16px; margin: 0in 0in 0.0001pt;"><span style="font-size: 10pt;">dba Vermont Solar Engineering</span></p>
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<p style="color: #aaaaaa; margin-top: 10px;">On 5/8/2021 7:32:53 PM, Dave Tedeyan <dave@sungineersolar.com> wrote:</p>
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<div dir="auto">Kirk,
<div dir="auto">Could there be a loose wire connection to the breaker? That could cause it to heat up an trip sooner than it otherwise would.</div>
<div dir="auto">Cheers,</div>
<div dir="auto">Dave</div>
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<div class="v1gmail_attr" dir="ltr">On Sat, May 8, 2021, 2:13 PM Kirk Herander, VSE <kirkh@vermont.solar> wrote:</div>
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<div id="v1m_-7795269527322252813__MailbirdStyleContent" dir="ltr" style="font-size: 12pt; font-family: Arial; color: #000000; text-align: left;">I have a system where the SE10000 inverter fried internally. The 60A AC output breaker tripped several times, as a result of the homeowner resetting over and over until he called me.
<div>I replaced the inverter under warranty and all is fine, except on sunny days the breaker will trip at about 40A, close to the max output of the inverter. Reset it outside of peak inverter output and its good. I assume the breaker has weakened from stress of some sort, so I replaced it and time will tell.</div>
<div>Anyone ever seen a breaker have it's trip point reduced like this?<br />
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<p class="v1MsoNormal" style="font-family: Arial; font-size: 16px; margin: 0in 0in 0.0001pt;"><span style="font-size: 10pt;"><a name="m_-7795269527322252813__MailAutoSig"></a><strong>Kirk Herander / </strong><strong><a style="color: blue;" title="Send an email to kirkh@vermont.solar" href="mailto:kirkh@vermont.solar" rel="noreferrer">kirkh@vermont.solar</a></strong><u></u><u></u></span></p>
<p class="v1MsoNormal" style="font-family: Arial; font-size: 16px; margin: 0in 0in 0.0001pt;"><span style="font-size: 10pt;"><strong>Owner|Principal, VT Solar, LLC</strong><u></u><u></u></span></p>
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